/*
 * Copyright (c) 2003-2010, Live Media Pty. Ltd.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted
 * provided that the following conditions are met:
 *
 *  1. Redistributions of source code must retain the above copyright notice, this list of
 *     conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright notice, this list of
 *     conditions and the following disclaimer in the documentation and/or other materials
 *     provided with the distribution.
 *  3. Neither the name of Live Media nor the names of its contributors may be used to endorse
 *     or promote products derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.colony.networkvm.instruction;

import java.io.IOException;

import com.argot.TypeException;
import com.argot.TypeInputStream;
import com.argot.TypeOutputStream;
import com.argot.TypeReader;
import com.argot.TypeWriter;
import com.colony.IColonyClient;
import com.colony.networkvm.NvmClient;
import com.colony.networkvm.machine.NvmInstance;
import com.colony.remote.RemoteException;

public class NvmToHostInstruction
implements NvmInstruction
{
	public static final String TYPENAME = "nvm.instruction.to_host";

    public void execute(NvmInstance request) 
    throws RemoteException
    {
        request.incProgramCounter();
        
        String host = (String) request.pop();
        
        // This will return after the host finishes processing.
        IColonyClient client = request.getEnvironment().getClient( host );
        if ( client == null )
        {
        	throw new RemoteException( "host not available: "+ host );
        }
        
        if ( !(client instanceof NvmClient))
        {
        	throw new RemoteException( "host not Nvm capable:" + host );
        }
    	NvmClient nvmClient = (NvmClient) client;
    	nvmClient.sendToHost( request );
    }

    public static class NvmToHostInstructionTypeWriter
    implements TypeWriter
    {
	    public void write(TypeOutputStream out, Object o) throws TypeException, IOException
	    {
	       // empty
	        
	    }
    }

    public static class NvmToHostInstructionTypeReader
    implements TypeReader
    {
	    public Object read(TypeInputStream in) throws TypeException, IOException
	    {
	        return new NvmToHostInstruction();
	    }
    }

}
